Installation guide

PMS Message 9-4
Chapter 9: Hotel - Property Management System (PMS)
MBX IP Hardware & Installation Guide
Flow Control Diagram
5. Link Check Mechanism
To check if the link is alive, the MBX IP system sends a Link Check message every 5
seconds. The client should respond to this message with an ACK message. If there is no
Answer message for 3 seconds, the MBX IP system retransmits the Link Check message.
If the client (PMS program) does not receive a message for 20 seconds, the connection is
closed and a new connection should be re-established.
PMS Message
The message exchanged between the PMS and the system is divided into Header and
Body.
The Header is used in all messages in common, and the Body depends on the message
type and the feature code.
All messages are Little Endian.
General Message Format
The following shows the general message format used in PMS.
Release 1.7
April 2012